Senior Mobile Voice Core Support Engineer

Our wide portfolio has long past the telecom services, and we are now offering digital solutions to millions of corporate, public, and private customers.

State-of-the-art technology, the latest innovations, and extremely talented professionals in various areas help us deliver the best-in-class products, services, and customer experience.

You’ll know A1 Bulgaria is the right place for you if you are driven by:

• Opportunities to learn and build your career;
• Meaningful work in a stable and fast-paced company;
• Diversity of people, projects, and platforms;
• A supportive, fun, and inspiring place to work.

Would you like to join us?

Plamen Gachev is looking for a new team member.

Your daily routine would include:

• Ensure high available, efficient operation and continuous enhancement of our Mobile Voice Core network and services (HLR, HSS, SDM);
• Utilize modern virtualized and cloud technologies for Subscriber Data Management to achieve peak network and services efficiency;
• Perform operations, configurations, system administration, testing, and maintenance activities, ensuring reliability and performance;
• Work closely with departments such as: NOC, RAN, Core, IP Transport and Security to ensure services alignment with overall business needs;
• Monitor performance indicators (KPIs) to continuously assess network and services performance and customers service quality.

We’ll know you can make it if you have:

• 5+ years practical experience with SDM (HLR, HSS, UDM) platforms and provisioning interface: operation and configuration management, system; healthchecks, analyzing statistics and end-2-end traces;
• Very good knowledge of all basic 3GPP message flow in a Mobile Network of different generations: 2G/3G/4G/5G (minimum is 4G), e.g. MAP, Diameter, SOAP;
• IP Networking and Routing Protocols, TCP/IP, Diameter, http/2;
• English is a must at least level B2 (upper intermediate) and German would be a very good add-on;
• Plus would be: practical experience with Nokia platform for SDM (HSS+HLR knowhow);
• Self-motivated with a proactive approach to problem-solving;
• Excellent analytical and communication skills.

Our gratitude for the job done will be eternal, but we’ll also offer you:

• Innovative technologies and platforms to “play” with;
• Modern working environment for your comfort;
• Friendly, ambitious, and motivated teammates to support each other;
• Thousands of online and in-person learning opportunities to grow;
• Challenging assignments and career development opportunities in multinational environment;
• Attractive remuneration package;
• Flexible working schedule and opportunity for home office;
• Numerous additional goodies, including, but not limited to free A1 services, discounts, health insurance and services, sports center, childcare, team and family events, etc.